Car-stopping attachment for elevators



w. s. ALLYN.

CAR-STOPPING ATTACHMENT FOR ELEVATORS. I

APPLICATION man NOV-22.1920.

1 ,398,6 1 9. Patented Nov. 29, 1921.

2 SHEETS-SHEIET 1.

Q I N 1 0/3? W. S. ALLYN.

CAR STOPPING ATTACHMENT FOR ELEVATORS.

APPLICATION FILED NOV. 22,1920- Patented Nov. 29, 1921.

2 SHEETS-SHEET 2.

UNITED STATES PATENT. OFFICEQ WALTER s. ALLYN, or LOGAN, ILLINOIS, Assrenoaor oNE-HALE r0 EARL v. AKIN,

. or BENTON, ILLINOIS. v

' OAR-STOPPING ATTACHMENT FOR ELEVATORS. I

' Application filed November 22, 1920. Serial No.' 425,717.'

panylng drawings, forming a part-of this specification.

This invention relates to lmprovements 1n car stopping attachments for elevators, one,

of the objects being to produce a car stop adapted to be automatically released when the elevator reaches a predetermined posltion, and thereafter positively restored before the car passes from the elevator.

A device of this kind is especially adapted for use in mines, where one car is pushed from an elevator while another car is passing onto the elevator, it being customary to use a loaded car moving onto the elevator as a means for pushing an empty car from the elevator. Following the ordinary practice, this operation is carried out very rapidly, and to avoid the loss of even a few moments time in the operation of the elevator, it'is customary for the person in charge of the cars to give a signal for the starting of the elevatorbefore the loaded car reaches the position in which it is to be automatically stopped on the elevator. As a result of this practice, serious accidents have occurred by failure of the automatic stopping devices to properly perform their functions.-

My object is to provide an absolutely reliable automatic car stop of this kind whereby the stop is automatically released to permit movement of the cars, and thereafter immediately restored to insure the stopping of the car passing onto the elevator.

With the foregoing and other objects in view, the invention comprises the novel construction, combination and arrangement of parts hereinafter more specifically described and illustrated in the accompanying draw ings wherein is shown the preferred embodiment of the invention. -However, it is to be understood that the invention comprehendschanges, variations and modifications which come within the scope of the claims hereunto a e -1 F g11 1'6.;[ l$' vert palseetion showing a portion of an elevator and two mine cars movable across the floor of the elevator.

lFlg. IIfis HHVIBW ofthe elevator, showing Specification of Letters Patent. Patented Nov. 29, 1921.

the automatic car stop as it appears immediately beforethe most position.

elevator reaches its lower- Fig. III is an enlarged section taken ap-- proximately on the line III- III, Fig. II.

A designates the vertically movable cage of a mine elevator provided with a floor or platform '1' on which rails 2 are secured. When the elevator occupies its lowermost position, the rails 2 are alined withrails 2 and-2 B and B indicate mine cars movable across the elevator so as to pass from the rails 2 tothe rails 2. An elevator of this type is ordinarily-used to elevate loaded cars to the top of a mine shaft, wherethey. v

are dumped and then lowered on the elevator. The car B may be considered as an empty car to beremoved from the elevator, whlle the car B 1s a loaded car to be used in pushingthe car B from the elevator.

The bottom of each car is provided with a I downwardly extending abutment 3 adapted to be confined bya car stop comprising a trlppable stop lever C and a yielding detent lever D, said levers being mounted between angle bars 4 on the floor of the elevator.

The detent lever D is .pivotally supported at 5 and provided with a spring 6 whereby its upper end is yieldingly held in'the path of the abutment'3. 7 designates a releasing chain connected to the detent lever D and adapted to be operated by hand to displace said lever from the path of the abutment 3. However, this detent lever D is ordinarily operated by the abutment 3 which can pass freely in one direction over thetop of said lever. For example, when the car B is moved in the direction indicated by the arrow in Fig.1, its abutment 3 will pass over and depress the upper end of lever 'D,'and immediately thereafter the spring 6 will restore said lever D to prevent retrograde movement of the car. When a car is'pushed onto the elevator in this manner, the lever C abutment 3 is confined between the levers :G and D, as shown by Fig. II.

When' the elevatorqreaches the positiony g I; the step lever Q tees? I ary abutment 16, and a continued downto move toward the rails 2 i 14: designates a weight located at the lower end of the trippable arm 11 and tending to retain the stop lever C in theposition shown by full :linesin Figs. I and II. lVhen the parts occupy the positions shown by Fig. 11; the weight 14 tends to retainthe' arm 11in engagement with the abutment 13. The leve 8 passes through a loop 15 (Figs'II andIII), and the "lower end of this loop serves. as meansfor limiting the downward.

movement of said lever 8 relative to the elevator. 16 designates a stationary stop, or abutment, located in the path of the lever 8 and adapted to be engaged by said lever for the purpose of transmitting movement I to the stop, lever C.

V The means for releasing the trippable arm 11 from the abutment 13 comprises a tripping lever 17 pivoted at 18 t0 the elevator and extending into the path of abutment 3 which is carried bythe car. The lower end of tripping lever 17 may be provided with a rolleradapted to engage the trippable The operation of this device isas follows Assuming that the elevator is mov-' ing downwardly from the position shown by Fig. II, the tree outer end ofthe stopdisplacing -lever 8 will engage the station- Wardmovement of the elevator will then re sult-in the transmission otmovement from lever 8 to the arm 11, and the stop lever C will thus be shiftedfrom its operative 'positionto the inoperative position shown by dotted lines in Fig. I.

- ment of the car,-itsabutment 3 passes over' hen the stop lever C has been displaced in this manner, the ear B can be moved to the right so as to pass from the elevator and onto the rails 2 During this'movethe stop lever C and engages the upper end of tripping lever 17, thereby displacing arm 11' from.theabutmentfl3 and permitting said arm to drop by gravity to the position shown by full lines in Fig. I. The downwardwmovement of arm -l'lwwill restore-the stop lever C to itsoperative position.-- It will now be understood that the stop lever C is automatically displaced to'permitmove- 1' ,ment'of the car," and at the very beginning V of this movement the' stop lever is quickly restored to serve asmeans for stopping an In actual practice thecar B passing onto the elevator is used to push the car B from the elevator, as suggestedby Fig. While these cars are in motion and when they are approximately in the positions illustrated by Fig. I, it is customary fo the operator "to give a signal for the'startmg of the elevator,

and in view of this ordinary practice it is very desirable to provide a positive means for sto in the car in a predetermined osition on the elevator. In the use of my device the stoplever C is restored to its operative position some time betoresthe cars reach the positions shown by Fig. I, and the abutment 3 on thecjar B will thereafter pass over the detent lever D and positively engage the stop lever-C; V V

After a car has been' properly delivered to the elevator, the operating mechanism of my automatic'devieewill be positioned as shown by full lines in Fig. l, and when the elevator moves upwardly, the'weightedlever 8 will rise fromthe stationary abutment so as to occupy the position'shown by Fig. 11 and the overhanging weight on the arm 11.

will cause said tomove to the position shown by Fig. 11; wherein its shoulder 12 overlies the abutment 13 on the'lever 8.

Under some unusual"conditions, the stop lever C1 and its depending arm ll'may' be displacedtothe positions shown by dotted lines in Fig. I, andthe automaticmecha nism may then fail to restore said parts to. the positions shown by full lines. For 8X ample, after the parts C and 1.1.have been displaced to the positionsf'shownby dotted lines, alump of coal maybe accidentally positioned between-the floor 1 and a part of lever C so as to retain said lever in the 'posi-- tion shown by dotted lines. vIf th'e sto'p lever should fail to returnfto theposition shown by full lines when the tripping lever 17 is actuated, another part of'myf apparatus will become effective to'eitherrestore the stop leveror limit the motion of the can.

- To a'ccomplish this, the stop lever (l is provided with an upwardly inclined resetting member 20 at one end, and when the other end of said lever is depressed to release "the car, said member 20 is elevated to'lie-in the path of the abutment 3 on the car, so if the armll fails to drop by gravity when it is displaced by the tripp lever 17",. the re iief * v n I I a setting member 20 will remain n an elevated I position, where it :will be engaged by the abutment 3. In this event, the abutment'ir will'strike the inclined'top face of resetting member 20 and eitheri restore the'leverC or stop the car.- If a lumpof-coal isj loabutment 3 will 'cotiperate with said member cated beneath the resetting -membe r 20, the

2 so as to crush the coal andat thesame time-restore the stop leverspbut if some relatively firm object is preventingfrestjora' r some the stop lever, the abutment 3 will cooperate with resetting member 20 to stop the car. This will occur immediately after the car begins its motion, so the operator will be quickly advised that the automatic device is inoperative, and under these conditions the operator will not give the signal for the usual prompt starting of the elevator.

I claim:

1. The combination of an elevator, a car movable on said elevator, a car stop carried by the elevator, a stop-displacing member carried by said elevator, an abutment adapted to be engaged by said stop-displacing member to cause operation thereof, trippable means whereby motion is transmitted from said stop-displacing member to said car stop so as to displace the stop from its operative position, and a car-actuated tripping member whereby said trippable means is displaced to restore said car stop, said abutment being engaged by said stop-displacing member when the elevator is positioned to receive the car, and said car-actuated tripping member being carried by the elevator so as to cooperate with said trippable means while the car is moving on the elevator.

2. The combination of an elevator having tracks, a car movable on said tracks and provided with an extended abutment, a car stop carried by said elevator and comprising a yielding detent lever and a trippable stop lever between which said extended abutment may be confined, a stop-displacing lever carried by said elevator, a stationary abutment in the path of said stop-displacing lever, a trippable arm pivoted to and depending from said trippable stop lever, said trippable arm having a shoulder adapted to be engaged by said stop-displacing lever, so as to displace said trippable stop lever from its 0perative position, and a car-actuated tripping lever whereby said trippable arm is released from said stop-displacing lever to restore said trippable stop lever, said car-actuating,

tripping lever being pivoted to the elevator and extended into the path of a part of the car.

3. The combination of an elevator, a car movable on said elevator, a car stop carried by the elevator, a stop-displacing member carried by said elevator, an abutment adapted to be engaged by said stop-displacing member to cause operation thereof, trippable means whereby motion is transmitted from said stop-displacing member to saidcar stop so as to displace the stop from its operative position, and a car-actuated tripping member whereby said trippable means is dis-' placed to restore said car stop, said car stop being provided with a resetting extension located in the path of the car when said car v stop occupies its inoperative position.

4. The combination of an elevator, a car movable on said elevator, a car stop carried by the elevator, a stop-displacing member carried by said elevator, an abutment adapts ed to be engaged by said stop-displacing member to cause operation thereof, trippable means whereby motion is transmitted from said stop-displacing member to said car stop so as to displace the stop from its operative position, and a car-actuated tripping member by the elevator, a stop-displacing member carried by said elevator, an abutment adapted to be engaged by said stop-displacing member to cause operation thereof, trippable means whereby motion is transmitted from said stop-displacing member to said car-stop so as to displace the stop from its operative position, and a car-actuated tripping member whereby said trippable means is displaced to restore said car stop, said car stop being in the form of a lever having an upwardly extending stop member at one end and an upwardly extending resetting member at the opposite end, said resetting member being in the path of the car when said stop member occupies its inoperative position, and said car-actuated tripping member being located in advance of said resetting member so as to normally restore said car stop before the car occupies an operative position relative to said resetting member.

In testimony that I claim the foregoing I hereunto aflix my signature.

WALTER s. ALLYN. 

